JP4066842B2

JP4066842B2 - Mobile drive unit

Info

Publication number: JP4066842B2
Application number: JP2003047864A
Authority: JP
Inventors: 健晴森
Original assignee: Toyota Industries Corp
Current assignee: Toyota Industries Corp
Priority date: 2003-02-25
Filing date: 2003-02-25
Publication date: 2008-03-26
Anticipated expiration: 2023-02-25
Also published as: JP2004256943A

Description

【０００１】
【発明の属する技術分野】
本発明は、移動体駆動装置に係り、例えば三次元繊維組織の厚さ方向糸の抜け止め糸挿通用針等の長尺の移動体の駆動に好適な移動体駆動装置に関するものである。
【０００２】
【従来の技術】
繊維強化複合材の補強基材として三次元織物（三次元繊維組織）があり、その製造方法として、複数の糸層を積層して形成された少なくとも２軸配向となる積層糸群に、その各糸層と交差する方向に挿入された厚さ方向糸にて結合する方法がある（例えば、特許文献１、特許文献２等参照）。この方法では、厚さ方向糸の挿入区域と対応する領域を囲むようにピンが所定ピッチで配置された枠体上に、そのピン間に折り返し状に配列した糸層を複数積層して積層糸群を形成する。その後、積層糸群を枠体に保持した状態で、一列に配置された複数の厚さ方向糸挿入針を使用して厚さ方向糸を挿入する。
【０００３】
三次元繊維組織を骨格材とした複合材の強度は、三次元繊維組織の影響を大きく受け、強度の大きな複合材を得るには、厚さ方向糸により積層糸群を締め付ける必要がある。そして、図６に示すように、積層糸群Ｆに一列に配列された厚さ方向糸挿入針６１を、厚さ方向糸ｚとともに積層糸群Ｆに突き刺し、厚さ方向糸挿入針６１の突出側（図６の下側）に厚さ方向糸ｚのループＬを形成する。次に、抜け止め糸挿通用針６２により抜け止め糸ＰをループＬに挿通した後、厚さ方向糸挿入針６１とともに厚さ方向糸ｚを引き戻し、抜け止め糸Ｐを介して厚さ方向糸ｚにより積層糸群Ｆを締め付ける。抜け止め糸挿通用針６２は、積層糸群Ｆを貫通した厚さ方向糸挿入針６１に繋がる厚さ方向糸ｚによって形成された多数のループＬを、前進時（図６の右方への移動時）には抜け止め糸Ｐを保持せずに通過し、後退時には抜け止め糸Ｐを保持して通過するように往復移動される。抜け止め糸挿通用針６２にはベラ針が使用されている。なお、図ではベラの図示が省略されている。抜け止め糸挿通用針６２はその基端において無端状のベルトに連結されて、無端状のベルトが駆動されることにより、往復移動されるように構成されている。
【０００４】
【特許文献１】
特開平８−２１８２４９号公報（明細書の段落［００３５］〜［００３９］、図３）
【特許文献２】
特開２０００−２７３７４３号公報（明細書の段落［００２５］，［００３３］，［００５２］〜［００５４］，［００６１］〜［００６７］、図３、図６、図１２、図１５）
【０００５】
【発明が解決しようとする課題】
三次元繊維組織を製造する際の三次元繊維組織の厚さ方向糸挿入装置では、厚さ方向糸ｚを挿入すべき積層糸群Ｆの幅によっては、抜け止め糸挿通用針６２の長さが、数十ｃｍから１ｍを超える場合もあり、針の太さは１〜２ｍｍ程度と細い。従って、抜け止め糸挿通用針６２は撓み易く、坐屈が起こり易い。また、抜け止め糸挿通用針６２は、積層糸群Ｆを貫通した厚さ方向糸挿入針６１に繋がる厚さ方向糸ｚによって形成された多数のループＬを通過するように往復移動されるため、抜け止め糸挿通用針６２が曲がったり、ぶれながら移動するとループＬや厚さ方向糸挿入針６１と干渉する。そのため、抜け止め糸挿通用針６２が真っ直ぐに移動するように案内するガイド部材が設けられる。しかし、ガイド部材があっても抜け止め糸挿通用針６２がループＬや厚さ方向糸挿入針６１等と干渉して抜け止め糸挿通用針６２に過負荷がかかる場合がある。ところが、特許文献１及び特許文献２には、抜け止め糸挿通用針６２に過負荷がかかった場合に関しては記載がない。
【０００６】
さらに、抜け止め糸挿通用針６２のように坐屈し易い移動体では、過負荷として抜け止め糸挿通用針６２に圧縮力が作用する場合と、引っ張り力が作用する場合とで同じ基準値（閾値）を用いてモータを停止させる構成では不具合が生じる。即ち、坐屈を防止するために圧縮時を基準とした閾値を使用する必要があり、引っ張り力が作用する場合には停止する必要がない負荷がかかった状態でも、圧縮時を基準とした閾値を基準に停止されるという不具合が生じる。
【０００７】
また、坐屈し易い移動体に限らず、例えば、移動体を水平方向ではなく垂直方向のように、往動時と復動時とで移動体に加わる重力の方向が異なるように移動させる場合には、過負荷で停止させる閾値を往動時及び復動時で同じにすると、前記の不具合が発生する。
【０００８】
本発明は、前記従来技術の問題に鑑みてなされたものであって、その目的は往復移動するように駆動される移動体に予め設定された値（閾値）以上の負荷がかかるのを防止し、しかも、往動時と復動時とでその閾値を異なる値に設定できる移動体駆動装置を提供することにある。
【０００９】
【課題を解決するための手段】
前記の目的を達成するため請求項１に記載の発明は、移動体を直線的に往復移動させる移動体駆動装置である。移動体駆動装置は、駆動源の動力により直線的に移動する駆動部と、前記駆動部と前記移動体との間に設けられた動力伝達部と、前記駆動部と前記動力伝達部とを離脱可能に連結する第１の連結手段と、前記動力伝達部と前記移動体とを離脱可能に連結する第２の連結手段とを備えている。前記移動体の往動時に該移動体に予め設定された値以上の第１の負荷がかかると、前記第１の連結手段による連結状態及び前記第２の連結手段による連結状態の一方が解除されるように構成されている。また、前記移動体の復動時に該移動体に予め設定された値以上の第２の負荷がかかると、前記第１の連結手段による連結状態及び前記第２の連結手段による連結状態の他方が解除されるように構成されている。
【００１０】
この発明では、移動体を直線移動させるための力が、駆動源の動力により直線的に移動する駆動部から、動力伝達部を介して移動体に伝達される。移動体が駆動部からの力により移動されている状態で、移動体にかかる負荷が予め設定された値（閾値）以上になると、第１の連結手段及び第２の連結手段の一方の連結状態が解除される。従って、前記閾値を過負荷未満の値に設定することにより、移動体に過負荷がかかる前に動力の伝達を遮断することができる。また、第１の連結手段及び第２の連結手段の連結が解除される負荷の値が、それぞれ異なるため、移動体に加わる過負荷の値が移動体の往動時と復動時とで異なる場合にも、支障なく対応できる。
【００１１】
請求項２に記載の発明は、請求項１に記載の発明において、前記第１の負荷及び第２の負荷の値が異なるように設定されている構成である。
請求項３に記載の発明は、請求項１又は請求項２に記載の発明において、前記第１の連結手段及び第２の連結手段は、前記移動体に加わる力の作用により連結状態が解除される構成である。この発明では、移動体に閾値以上の負荷に相当する力がかかると、第１の連結手段及び第２の連結手段の一方の連結状態がその力の作用により解除される。従って、負荷の値を検出して、その信号に基づいて駆動される駆動手段により連結状態を解除する構成に比較して、第１の連結手段及び第２の連結手段の構成が簡単になる。
【００１２】
請求項４に記載の発明は、請求項３に記載の発明において、前記第１の連結手段は、前記駆動部及び動力伝達部のいずれか一方に装備された第１の可動係合部と、前記駆動部及び動力伝達部の他方に装備され、前記第１の可動係合部と係合して連結状態を保持する第１の被係合部とを備えている。前記第１の可動係合部は前記第１の被係合部と係合する方向に付勢手段により付勢されている。前記第２の連結手段は、前記動力伝達部及び移動体のいずれか一方に装備された第２の可動係合部と、前記動力伝達部及び移動体の他方に装備され、前記第２の可動係合部と係合して連結状態を保持する第２の被係合部とを備えている。前記第２の可動係合部は前記第２の被係合部と係合する方向に付勢手段により付勢されている。移動体の復動時には第１の可動係合部に前記付勢手段の付勢力に抗する力が作用し、移動体の往動時には第２の可動係合部に前記付勢手段の付勢力に抗する力が作用する。
【００１３】
この発明では、第１の連結手段及び第２の連結手段は、それぞれ可動係合部と被係合部とが係合した状態で連結状態に保持され、可動係合部が被係合部と係合しない位置に移動すると連結状態が解除される。可動係合部は付勢手段により被係合部と係合する方向に付勢されているが、移動体の復動時には第１の可動係合部に前記付勢手段の付勢力に抗する力が作用し、移動体に作用する負荷の値が閾値に達すると、第１の可動係合部は第１の被係合部と係合しない位置へ移動される。移動体の往動時には第２の可動係合部に前記付勢手段の付勢力に抗する力が作用し、移動体に作用する負荷の値が閾値に達すると、第２の可動係合部は第２の被係合部と係合しない位置へ移動される。従って、付勢手段の付勢力を閾値に対応した値に設定することにより、第１の連結手段及び第２の連結手段による連結状態を必要なときに解除できる。
【００１４】
【発明の実施の形態】
以下、本発明を三次元繊維組織の厚さ方向糸挿入装置における抜け止め糸挿通用針の駆動装置に具体化した一実施の形態を図１〜図４に従って説明する。図１（ａ）は抜け止め糸挿通用針駆動装置の模式側面図、図１（ｂ）は図１（ａ）の部分拡大図、図１（ｃ）は図１（ｂ）の部分拡大図、図１（ｄ）は部分平面図、図１（ｅ）は図１（ｄ）の部分拡大図、図２は厚さ方向糸挿入装置の概略正面図である。なお、図１（ａ）は抜け止め糸挿通用針駆動装置を見ている方向が図２とは逆で、図２における紙面の裏側から見た状態を表している。図３（ａ），（ｂ）は作用を説明する部分模式平面図、図４（ａ），（ｂ）は作用を説明する部分模式側面図である。
【００１５】
厚さ方向糸挿入装置は、抜け止め糸挿通用針駆動装置を除いて、本願出願人が先に提案した特許文献２に開示した装置と同様に構成されている。図２に示すように、厚さ方向糸挿入装置１１は、積層糸群Ｆを支持した移送テーブル１２の上方に厚さ方向糸挿入針駆動部１３及び穿孔針駆動部（図示せず）を備えている。移送テーブル１２はその左右両側（図２における左右両側）に複数の走行輪１２ａを装備し、機台フレーム１４の長手方向（図２の紙面と垂直方向）に延びるように配設された支持レール１５上に、移動可能に支承されている。
【００１６】
機台フレーム１４には、支持レール１５と平行に設けられ、ねじ軸が図示されていないサーボモータにより正逆回転駆動されるボールねじ機構１６が設けられている。ボールねじ機構１６のボールナット１７の下面にエアシリンダ１８が固定され、エアシリンダ１８のピストンロッドの先端が移送テーブル１２の側壁に形成された係合穴と係合する状態で、ねじ軸が回転されることにより、ボールナット１７と共に移送テーブル１２が移動されるようになっている。
【００１７】
機台フレーム１４の上面には可動支持フレーム１９が、機台フレーム１４の長手方向に移動可能に支持されている。可動支持フレーム１９は、機台フレーム１４に固定されたエアシリンダにより、穿孔針（図示せず）と厚さ方向糸挿入針２０との取り付けピッチに等しい距離を往復移動可能となっている。なお、図２においては、厚さ方向糸挿入針駆動部１３の後方に配置された穿孔針駆動部は省略されている。
【００１８】
可動支持フレーム１９には左右一対のレール２１が上下方向に延びるように配設され、厚さ方向糸挿入針２０が１列に装備された針支持体２２がレール２１に沿って昇降可能に配設されている。針支持体２２は、両レール２１間に配設されたボールねじ機構２３のボールナット２３ａに固定され、ボールねじ機構２３のねじ軸２３ｂの正逆回転に伴って昇降される。そして、針支持体２２はボールナット２３ａと共に移動して、厚さ方向糸挿入針２０が移送テーブル１２に保持された積層糸群Ｆと係合不能な待機位置と、針孔（図示せず）が積層糸群Ｆの反対側となる位置まで積層糸群Ｆを貫通する作用位置（図２に示す状態）とに移動される。
【００１９】
機台フレーム１４の下部には移送テーブル１２の移動範囲を挟んで厚さ方向糸挿入針駆動部１３及び穿孔針駆動部と対向する位置に支持フレーム２４が固定されている。支持フレーム２４には、プレスブロック２５ａ，２５ｂが、積層糸群Ｆに厚さ方向糸ｚを挿入する際、積層糸群Ｆと係合して積層糸群Ｆを厚さ方向糸挿入針２０列の後退側へ押圧する作用位置と、積層糸群Ｆと係合不能な待機位置とに移動可能に装備されている。プレスブロック２５ｂはプレスブロック２５ａに対して図２において紙面の裏側に配置されている。
【００２０】
抜け止め糸挿通用針駆動装置２６は機台フレーム１４の側方に突出する状態で配設されている。抜け止め糸挿通用針駆動装置２６の支持フレーム２７は支持フレーム２４に一端が固定されている。支持フレーム２７には移送テーブル１２より若干低い位置で水平に延びる部分に、一対のプーリ２８ａ，２８ｂが同じ高さ位置に、その軸が厚さ方向糸挿入針２０列の配列方向と直交する方向に延びるように配設されている。両プーリ２８ａ，２８ｂ間に無端状のベルト２９が、その走行経路の一部が厚さ方向糸挿入針２０列の配列方向と平行になるように巻き掛けられている。機台フレーム１４に近い側に配設されたプーリ２８ｂが一体回転可能に固定された回転軸３０の端部にはプーリ３１が一体回転可能に固定されている。なお、図２においては、プーリ２８ｂはプーリ３１に対して紙面の裏側に位置するため、現れていない。支持フレーム２７にはプーリ２８ｂの下方において駆動源としてのサーボモータ３２が固定され、サーボモータ３２の駆動軸に固定された駆動プーリ３３と、プーリ３１との間にベルト３４が巻き掛けられている。そして、サーボモータ３２の正逆回転駆動に伴ってベルト２９が往復走行される。
【００２１】
図２に示すように、ベルト２９は上側の水平走行位置が抜け止め糸を挿通すべき高さより低い高さで、厚さ方向糸挿入針２０列の配列方向と平行に延びるように配設されている。図１（ａ）に示すように、ベルト２９の上方には案内路３５が厚さ方向糸挿入針２０列の配列方向と平行に延びるように配設されている。案内路３５は移動体としての抜け止め糸挿通用針３６を案内路３５に沿って直線移動可能に支承するように形成されている。抜け止め糸挿通用針３６は、ロッド３６ａとその先端に固定されたベラ針３６ｂとで構成されている。ロッド３６ａは炭素繊維強化樹脂で形成されている。なお、図ではベラの図示が省略されている。支持フレーム２７には案内路３５の一端の、作用位置に配置された状態の厚さ方向糸挿入針２０列の端部近傍に位置するように、ロッドガイド３５ａが図示しないブラケットを介して固定されている。ロッドガイド３５ａは抜け止め糸挿通用針３６の横揺れを規制する。
【００２２】
支持フレーム２７にはガイドレール３７が、ベルト２９の上側及び下側の水平走行位置の中間位置において水平に固定されている。ガイドレール３７上には、駆動源の動力により直線的に移動する駆動部としてのブラケット３８と、駆動部の力を移動体に伝達する動力伝達部３９とが、それぞれリニアガイドブロック４０を介してガイドレール３７に沿って移動可能に支持されている。
【００２３】
ブラケット３８は断面コ字状に形成され、図１（ｂ），（ｃ）に示すように、その上部片３８ａにおいてベルト２９の上側走行部に連結されている。上部片３８ａには、ブラケット３８と動力伝達部３９とを連結する第１の連結手段を構成するダンパー４１が上下方向に延びるように固定されている。ダンパー４１はシリンダ４２及び該シリンダ４２に対して出没可能、かつシリンダ４２に内蔵された図示しない付勢手段（例えば、スプリング）により突出側に付勢されたプランジャ４２ａを備えている。プランジャ４２ａは第１の可動係合部を構成し、その先端には斜面を有する係合部４２ｂが形成されている。係合部４２ｂは、係合部４２ｂにプランジャ４２ａの軸方向と直交する図１（ｂ），（ｃ）における右方向から押圧力が作用すると、プランジャ４２ａに対してプランジャ４２ａをシリンダ内に没入させる方向への分力が作用する形状に形成されている。そして、シリンダ４２に内蔵された前記スプリングは、抜け止め糸挿通用針３６の復動時に抜け止め糸挿通用針３６に予め設定された値以上の第２の負荷がかかると、係合部４２ｂと後記する第１の被係合部との係合が解除される位置までプランジャ４２ａが移動可能なばね力に形成されている。即ち、第１の連結手段は、移動体に加わる力の作用により連結状態が解除される構成である。
【００２４】
動力伝達部３９は、リニアガイドブロック４０に固定されたブロック４３と、ブロック４３の上部に固定された支持板４４とで構成されている。ブロック４３には、一端に小径のねじ軸４５ａを有する円柱部材４５が、ブロック４３のブラケット３８と対向する側の端面に形成されたねじ穴にねじ軸４５ａが螺合された状態で水平に固定されている。円柱部材４５の先端寄りには係合部４２ｂと係合可能な第１の被係合部４５ｂが形成されている。第１の被係合部４５ｂは円柱部材４５の周方向に沿って延びる環状溝で構成されている。第１の被係合部４５ｂは、環状溝の断面形状が、係合部４２ｂと同じ角度の斜面を有する形状に形成されている。そして、係合部４２ｂが第１の被係合部４５ｂに係合した状態で、ブラケット３８と動力伝達部３９とが連結されて、ガイドレール３７上を一体に移動される。円柱部材４５はダンパー４１とともに第１の連結手段を構成する。
【００２５】
図１（ｂ），（ｄ）に示すように、動力伝達部３９の支持板４４の上部には、動力伝達部３９と抜け止め糸挿通用針３６とを離脱可能に連結する第２の連結手段を構成するダンパー４６がロッド３６ａ、即ち抜け止め糸挿通用針３６と直交方向に水平状態で延びるように固定されている。図１（ｄ）に示すように、ダンパー４６はシリンダ４７及び該シリンダ４７に対して出没可能、かつシリンダ４７に内蔵された図示しない付勢手段（例えば、スプリング）により突出側に付勢されたプランジャ４７ａを備えている。プランジャ４７ａは第２の可動係合部を構成し、その先端には係合部４７ｂが形成されている。
【００２６】
図１（ｄ），（ｅ）に示すように、係合部４７ｂの形状は、抜け止め糸挿通用針３６のロッド３６ａの基端寄りに形成された第２の被係合部４８と対応した形状に形状されている。第２の被係合部４８は、上方から見た状態（平面視）において、ロッド３６ａの移動方向と直交する面４８ａと、面４８ａに対してロッド３６ａの先端側に設けられ面４８ａと鋭角を成す斜面４８ｂとを有する形状に形成されている。従って、係合部４７ｂにプランジャ４７ａの軸方向と直交する方向で、かつ斜面４８ｂ側から押圧力が作用すると、プランジャ４７ａに対してプランジャ４７ａをシリンダ４７内に没入させる方向への分力が作用する。しかし、面４８ａ側から押圧力が作用する場合はプランジャ４７ａをシリンダ４７内に没入させる方向への分力が作用しないように構成されている。そして、シリンダ４７に内蔵された前記スプリングは、抜け止め糸挿通用針３６の往動時に抜け止め糸挿通用針３６に予め設定された値以上の第１の負荷がかかると、係合部４７ｂと後記する第２の被係合部との係合が解除される位置までプランジャ４７ａが移動可能なばね力に形成されている。即ち、第２の連結手段も、移動体に加わる力の作用により連結状態が解除される構成である。
【００２７】
第１の連結手段を構成するプランジャ４２ａを突出側に付勢するスプリングと、第２の連結手段を構成するプランジャ４７ａのスプリングとは付勢力が異なり、プランジャ４２ａ用のスプリングの付勢力がプランジャ４７ａ用のスプリングの付勢力より大きく設定されている。
【００２８】
次に前記のように構成された抜け止め糸挿通用針駆動装置２６の作用を説明する。積層糸群Ｆが移送テーブル１２に支持され、抜け止め糸挿通用針３６が待機位置に配置された状態で、厚さ方向糸挿入針駆動部１３が駆動され、図２に示すように、積層糸群Ｆに厚さ方向糸挿入針２０が突き刺される。そして、厚さ方向糸挿入針２０が若干引き戻されると、図６に示す場合と同様に、厚さ方向糸挿入針２０の突出側に厚さ方向糸ｚのループＬが形成される。
【００２９】
次に、サーボモータ３２が正転駆動され、ベラ針３６ｂがループＬを通過して図示しない抜け止め糸を保持する位置まで抜け止め糸挿通用針３６が前進移動（往動）される。そして、ベラ針３６ｂの先端に抜け止め糸が保持された後、サーボモータ３２が逆転駆動されて抜け止め糸挿通用針３６が待機位置まで後退移動（復動）され、抜け止め糸が厚さ方向糸ｚのループＬ内に折り返し状に挿通される。その後、厚さ方向糸挿入針２０とともに厚さ方向糸ｚが引き戻され、抜け止め糸を介して厚さ方向糸ｚにより積層糸群Ｆが締め付けられる。
【００３０】
抜け止め糸挿通用針３６の往動を詳述すると、サーボモータ３２の正転駆動により、プーリ２８ａ，２８ｂが図１（ａ）の反時計方向に回転されてベルト２９が上側走行部が抜け止め糸挿通用針３６の前進方向（図１（ａ）の左方向）へ移動される。ベルト２９の移動に伴いブラケット３８がベルト２９の上側走行部と一体に移動され、ブラケット３８を移動させる力がダンパー４１及び第１の被係合部４５ｂを介して動力伝達部３９に駆動力（移動力）として伝達される。また、動力伝達部３９に伝達された力が、ダンパー４６及び第２の被係合部４８を介して抜け止め糸挿通用針３６に伝達される。従って、サーボモータ３２の正転に伴って、抜け止め糸挿通用針３６が前進方向に移動される。
【００３１】
抜け止め糸挿通用針３６の前進移動時に抜け止め糸挿通用針３６に負荷がかかると、即ち抜け止め糸挿通用針３６にその前進を抑制する力が加わると、抜け止め糸挿通用針３６の第２の被係合部４８の斜面４８ｂからプランジャ４７ａの係合部４７ｂに、図３（ａ）に破線の矢印で示す方向に力が加わる。その力にはプランジャ４７ａを付勢手段の力に抗して没入側に移動させる方向の分力が含まれる。そして、抜け止め糸挿通用針３６に予め設定された値以上の第１の負荷が作用すると、プランジャ４７ａは係合部４７ｂと第２の被係合部４８との係合が解除される位置までシリンダ４７内に没入作動される。その結果、動力伝達部３９と抜け止め糸挿通用針３６とを連結する係合部４７ｂと第２の被係合部４８との係合状態、即ち第２の連結手段による連結状態が解除されて図３（ｂ）に示す状態となる。
【００３２】
抜け止め糸挿通用針３６に負荷がかかると、動力伝達部３９を介して第１の被係合部４５ｂからプランジャ４２ａの係合部４２ｂに力が加わる。しかし、その力にはプランジャ４２ａを付勢手段の力に抗して没入側に移動させる方向の分力が含まれない。従って、抜け止め糸挿通用針３６の前進移動時には、第１の被係合部４５ｂと係合部４２ｂとの係合状態、即ち第１の連結手段による連結状態は解除されない。
【００３３】
一方、抜け止め糸挿通用針３６の後退移動時に抜け止め糸挿通用針３６に負荷がかかると、即ち抜け止め糸挿通用針３６にその後退を抑制する力が加わると、動力伝達部３９に図４（ａ）に破線の矢印で示す方向に力が加わる。そして、抜け止め糸挿通用針３６の第２の被係合部４８の面４８ａからプランジャ４７ａの係合部４７ｂに同方向の力が加わる。しかし、その力にはプランジャ４７ａを付勢手段の力に抗して没入側に移動させる方向の分力が含まれない。従って、抜け止め糸挿通用針３６の後退移動時には、動力伝達部３９と抜け止め糸挿通用針３６とを連結する係合部４７ｂと第２の被係合部４８との係合状態、即ち第２の連結手段による連結状態が解除されることはない。
【００３４】
また、抜け止め糸挿通用針３６に負荷がかかると、動力伝達部３９を介して第１の被係合部４５ｂからプランジャ４２ａの係合部４２ｂに力が加わり、その力にはプランジャ４２ａを付勢手段の力に抗して没入側に移動させる方向の分力を有する。そして、抜け止め糸挿通用針３６に予め設定された値以上の第２の負荷が作用すると、プランジャ４２ａは係合部４２ｂと第１の被係合部４５ｂとの係合が解除される位置までシリンダ４２内に没入作動される。その結果、動力伝達部３９とブラケット３８とを連結する係合部４２ｂと第１の被係合部４５ｂとの係合状態、即ち第１の連結手段による連結状態が解除されて図４（ｂ）に示す状態となる。第２の負荷の値が第１の負荷の値より大きく設定されているため、抜け止め糸挿通用針３６の後退移動時には抜け止め糸挿通用針３６に前進移動時より大きな負荷が加わったときに動力伝達が遮断される。
【００３５】
この実施の形態では以下の効果を有する。
（１）抜け止め糸挿通用針駆動装置２６は、駆動源（サーボモータ３２）の動力により直線的に移動する駆動部（ブラケット３８）の力が第１の連結手段を介して動力伝達部３９に伝達され、動力伝達部３９の力が第２の連結手段を介して移動体（抜け止め糸挿通用針３６）に伝達される。抜け止め糸挿通用針３６の往動時に予め設定された値以上の第１の負荷がかかると、第２の連結手段による連結状態が解除され、抜け止め糸挿通用針３６の復動時に予め設定された値以上の第２の負荷がかかると、第１の連結手段による連結状態が解除される。そして、第１の負荷の値が第２の負荷の値より大きく設定されている。
【００３６】
従って、抜け止め糸挿通用針３６の前進移動時に抜け止め糸挿通用針３６に負荷がかかる状態となっても、過負荷がかかる前に駆動部からの動力伝達が遮断され、抜け止め糸挿通用針３６、厚さ方向糸挿入針２０あるいは厚さ方向糸の損傷を確実に回避できる。また、抜け止め糸挿通用針３６に引っ張り力が作用する後退移動時には、抜け止め糸挿通用針３６に前進時よりも大きな負荷が作用するまで、動力伝達が遮断されないので、停止する必要がない負荷がかかった状態で抜け止め糸挿通用針３６が停止されるという不具合がを防止できる。即ち、第１の連結手段及び第２の連結手段の連結が解除される負荷の値が、それぞれ異なるため、移動体に加わる過負荷の値が移動体の往動時と復動時とで異なる場合にも、支障なく対応できる。
【００３７】
（２）第１の連結手段及び第２の連結手段は、移動体（抜け止め糸挿通用針３６）に加わる力の作用により連結状態が解除される構成である。従って、抜け止め糸挿通用針３６に予め設定された値以上の負荷に相当する力がかかると、第１の連結手段及び第２の連結手段の一方の連結状態がその力の作用により解除される。そのため、負荷の値を検出して、その信号に基づいて駆動される駆動手段により連結状態を解除する構成に比較して、第１の連結手段及び第２の連結手段の構成が簡単になる。
【００３８】
（３）第１の連結手段は、駆動部に装備された第１の可動係合部（プランジャ４２ａ）と、動力伝達部３９に装備され第１の可動係合部と係合して連結状態を保持する第１の被係合部４５ｂとを備え、第１の可動係合部は第１の被係合部４５ｂと係合する方向に付勢手段により付勢されている。第２の連結手段は、動力伝達部に装備された第２の可動係合部（プランジャ４７ａ）と、移動体に装備され第２の可動係合部と係合して連結状態を保持する第２の被係合部４８とを備え、第２の可動係合部は第２の被係合部４８と係合する方向に付勢手段により付勢されている。移動体の復動時には第１の可動係合部に前記付勢手段の付勢力に抗する力が作用し、移動体の往動時には第２の可動係合部に前記付勢手段の付勢力に抗する力が作用する。従って、付勢手段の付勢力を予め設定された負荷の値に対応した値に設定することにより、移動体に作用する力を利用して、第１の連結手段及び第２の連結手段による連結状態を必要なときに解除できる。
【００３９】
（４）第１の連結手段及び第２の連結手段は、プランジャ４２ａ，４７ａの先端に形成された係合部４２ｂ、４７ｂを介してプランジャ４２ａ，４７ａを付勢手段の付勢力に抗して没入側へ移動させ、連結状態を解除する構成である。従って、係合部４２ｂ、４７ｂの第１及び第２の被係合部４５ｂ，４８と係合する面の軸方向に対する角度を変えることで、付勢手段の付勢力が同じであってもプランジャ４２ａ，４７ａが没入作動する力の設定を調整でき、付勢力との組合せにより所望の値に設定するのが容易となる。
【００４０】
（５）細くて長く座屈が生じ易い抜け止め糸挿通用針３６を移動体として移動させる駆動装置に適用されているため、抜け止め糸挿通用針３６による抜け止め糸の挿通作業が円滑に行われる。
【００４１】
実施の形態は前記に限定されるものではなく、例えば、次のように具体化してもよい。
〇第１の連結手段を構成する第１の可動係合部を動力伝達部３９側に設け、第１の被係合部を駆動部（ブラケット３８）側に設けてもよい。例えば、ブロック４３に代えてコ字状のブラケットを設け、該ブラケットにダンパー４１を上下方向に延びるように固定する。一方、ブラケット３８側に円柱部材４５を、第１の被係合部４５ｂがダンパー４１のプランジャ４２ａの係合部４２ｂと係合可能な状態となる位置に固定する。この場合も、前記実施の形態と同様な効果が得られる。
【００４２】
○ 第２の連結手段を構成する第２の可動係合部を移動体（抜け止め糸挿通用針３６）側に設け、第２の被係合部を動力伝達部３９側に設けてもよい。例えば、ロッド３６ａの基端側にシリンダ４７をロッド３６ａと直交するように固定し、支持板４４に第２の被係合部４８を形成する。斜面４８ｂの向きは、移動体（抜け止め糸挿通用針３６）の往動時に該移動体に予め設定された値以上の第１の負荷がかかると、斜面４８ｂからプランジャ４７ａを没入方向へ移動させる方向の力が作用するように設定する。この場合も、移動体の往動時に、移動体に過負荷がかかる前に、駆動部からの動力伝達が遮断され、移動体に過負荷がかかるのが防止される。
【００４３】
○ 第１の連結手段及び第２の連結手段は、移動体に加わる力の作用により連結状態が解除される構成に限らず、移動体に加わる負荷の値をセンサで検出し、その検出信号に基づいて負荷が予め設定された値に達した時に、駆動手段を作動させて連結状態を解除する構成にしてもよい。例えば、ダンパー４１，４６に代えて、駆動手段としてソレノイドを使用し、プランジャの先端に前記実施の形態と同様に係合部を形成する。そして、移動体に加わる負荷の値が設定値未満のときはプランジャが突出位置に保持されて連結状態が確保され、負荷の値が設定値以上になるとプランジャが没入作動されて連結状態が解除される構成とする。この場合、第１の連結手段及び第２の連結手段の連結を解除する基準となる負荷の値の変更が容易となる。例えば、同じ厚さ方向糸挿入装置１１で製造する三次元繊維組織の種類の変更により、厚さ方向糸挿入針２０、抜け止め糸挿通用針３６、厚さ方向糸ｚとして太さの異なるものを使用する場合、抜け止め糸挿通用針３６にかかる負荷の許容値が異なるため、前記負荷の設定値を変更するのが好ましい。その際、ソレノイドにプランジャを没入作動させる駆動信号を出力する基準となる負荷の値を変更するだけで簡単に対応できる。
【００４４】
○ プランジャを没入側に移動させる方向の分力を往動側と復動側とで変えるため、プランジャの面取りを行う角度を往動側と復動側とで変えてもよい。例えば、図５に示すように、抜け止め糸挿通用針３６のロッド３６ａに第１の被係合部としての斜面４９ａと、第２の被係合部としての斜面４９ｂとを備えた切り欠きを設ける。また、ベルト３４と一体に移動されるダンパー４６に代えて、プランジャ５０ａの先端に、斜面４９ａと同じ角度の斜面５１ａ及び斜面４９ｂと同じ角度の斜面５１ｂが形成されたダンパー５０を使用する。斜面５１ａ及びプランジャ５０ａが第１の可動係合部を構成して第１の連結手段に相当する。斜面５１ｂ及びプランジャ５０ａが第２の可動係合部を構成して第２の連結手段に相当する。こうすることにより、使用するダンパーは１ヶですむ。
【００４５】
○ ダンパー４１のプランジャ４２ａの先端に、係合部４２ｂとして先端が縮径となる円錐台状の係合部４２ｂを形成してもよい。そして、ブロック４３に固定された円柱部材４５の先端寄りに形成された第１の被係合部４５ｂとしての環状溝の断面形状を第１の被係合部４５ｂの形状に合わせる。即ち、環状溝の断面における両側壁の形状を、係合部４２ｂのテーパと同じ角度のテーパ状に形成する。この場合、組み付け時、あるいは第１の被係合部４５ｂとの係合が解除された状態となった係合部４２ｂを再び第１の被係合部４５ｂと係合させる際、プランジャ４２ａが回動しても支障無く容易に係合位置に配置することができる。
【００４６】
○ 前記実施の形態において、ソレノイドに代えてエアシリンダを設け、そのピストンロッドの先端に係合部を形成してもよい。
○ 駆動部としてのブラケット３８を直線的に移動させる手段として、サーボモータ３２により駆動プーリ３３、プーリ３１，２８ｂ，２８ａを介して駆動されるベルト２９に代えて、リニアアクチュエータを使用してもよい。例えば、ボールねじ機構を備えたリニアアクチュエータのボールナットにブラケット３８を固定してもよい。
【００４７】
○ 動力伝達部３９を構成するブロック４３及び支持板４４を一体に形成してもよい。
○ ダンパー４１，４６，５０はプランジャ４２ａ，４７ａ，５０ａを突出側に付勢する付勢手段としスプリングに代えて、気体の圧力を利用する構成としてもよい。
【００４８】
○ 移動体は厚さ方向糸挿入装置１１に使用される抜け止め糸挿通用針３６に限らず、直線的に往復移動されるとともに、往動時と復動時とで移動体に作用する負荷が、過負荷となる値が異なるものであればよい。例えば、厚さ方向糸挿入装置１１において、厚さ方向糸挿入針駆動部１３や穿孔針駆動部に適用してもよい。厚さ方向糸挿入針駆動部１３は針支持体２２に固定された厚さ方向糸挿入針２０を昇降させるため、上昇移動時と、下降移動時とで正常状態でも厚さ方向糸挿入針駆動部１３に加わる負荷が異なり、それに加えて積層糸群Ｆに厚さ方向糸挿入針２０を挿入する際と引き抜く際とで負荷の度合いが異なる。従って、往動時と復動時とで、移動体に予め設定された値（閾値）以上の負荷がかかるのを防止し、しかも、往動時と復動時とでその閾値を異なる値に設定することは有用である。
【００４９】
○ 移動体の往動時に該移動体に予め設定された値以上の第１の負荷がかかったときに連結状態が解除されるのは第２の連結手段による連結状態ではなく、第１の連結手段による連結状態が解除され、復動時に第２の負荷がかかったときに、第２の連結手段による連結状態が解除される構成としてもよい。
【００５０】
○ 移動体の往動時に作用する負荷の基準値の方を、復動時に移動体に作用する負荷の基準値より大きく設定する構成であってもよい。
以下の技術的思想（発明）は前記実施の形態から把握できる。
【００５１】
（１）請求項１に記載の発明において、前記第１の連結手段及び第２の連結手段は、前記移動体に加わる負荷の大きさを検出する検出手段の検出信号に基づいて駆動される駆動手段により、可動係合部を駆動させて、連結状態と非連結状態とに切り換え可能に構成されている。
【００５２】
（２）請求項４に記載の発明において、前記第１及び第２の可動係合部はダンパーのプランジャであり、前記付勢手段はダンパーのシリンダに内蔵されたスプリングである。
【００５３】
（３）請求項１〜請求項４及び前記技術的思想（１），（２）のいずれかに記載の発明において、前記移動体は三次元繊維組織の厚さ方向糸挿入装置の抜け止め糸挿通用針である。
【００５４】
【発明の効果】
以上、詳述したように、請求項１〜請求項４に記載の発明によれば、往復移動するように駆動される移動体に予め設定された値（閾値）以上の負荷がかかるのを防止し、しかも、往動時と復動時とでその閾値を異なる値に設定できる。
【図面の簡単な説明】
【図１】（ａ）は一実施の形態の抜け止め糸挿通用針駆動装置の模式側面図、（ｂ）は（ａ）の部分拡大図、（ｃ）は（ｂ）の部分拡大図、（ｄ）は（ａ）の部分平面図、（ｅ）は（ｄ）の部分拡大図。
【図２】厚さ方向糸挿入装置の概略部分正面図。
【図３】（ａ），（ｂ）は前進時に設定値以上の負荷を受けた際の作用を説明する模式部分平面図。
【図４】（ａ），（ｂ）は後退時に設定値以上の負荷を受けた際の作用を説明する模式部分側面図。
【図５】別の実施の形態の第１及び第２の連結手段を示す模式平面図。
【図６】抜け止め糸の挿通状態を説明する模式側面図。
【符号の説明】
３２…駆動源としてのサーボモータ、３６…移動体としての抜け止め糸挿通用針、３８…駆動部としてのブラケット、３９…動力伝達部、４２ａ…第１の連結手段を構成する第１の可動係合部としてのプランジャ、４５ｂ…第１の連結手段を構成する第１の被係合部、４７ａ…第２の連結手段を構成する第２の可動係合部としてのプランジャ、４８…第２の被係合部、４９ａ…第１の被係合部としての斜面、４９ｂ…第２の被係合部としての斜面、５０ａ…第１の可動係合部及び第１の連結手段を構成するプランジャ、５１ａ…同じく斜面、５１ｂ…第２の可動係合部及び第２の連結手段を構成する斜面５１ｂ。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a moving body driving apparatus, and more particularly to a moving body driving apparatus suitable for driving a long moving body such as a thread insertion needle for retaining a thread in a thickness direction of a three-dimensional fiber structure.
[0002]
[Prior art]
There is a three-dimensional woven fabric (three-dimensional fiber structure) as a reinforcing base material of a fiber reinforced composite material. There is a method of bonding with a thickness direction thread inserted in a direction crossing the layer (see, for example, Patent Document 1, Patent Document 2, etc.). In this method, a plurality of yarn layers arranged in a folded manner between the pins are laminated on a frame in which pins are arranged at a predetermined pitch so as to surround a region corresponding to the insertion region of the thickness direction yarn. Form. Thereafter, with the laminated yarn group held in the frame, the thickness direction yarns are inserted using a plurality of thickness direction yarn insertion needles arranged in a row.
[0003]
The strength of a composite material having a three-dimensional fiber structure as a skeleton material is greatly influenced by the three-dimensional fiber structure, and in order to obtain a composite material having a high strength, it is necessary to fasten the laminated yarn group with thickness direction yarns. Then, as shown in FIG. 6, the thickness direction thread insertion needles 61 arranged in a row in the lamination thread group F are pierced into the lamination thread group F together with the thickness direction thread z, and the protruding side of the thickness direction thread insertion needle 61 ( A loop L of the thickness direction thread z is formed on the lower side of FIG. Next, after the retaining thread P is inserted into the loop L by the retaining thread insertion needle 62, the thickness direction thread z is pulled back together with the thickness direction thread inserting needle 61, and the thickness direction thread is passed through the retaining thread P. The laminated yarn group F is tightened by z. The retaining thread insertion needle 62 moves forward through a number of loops L formed by the thickness direction thread z connected to the thickness direction thread insertion needle 61 penetrating the laminated thread group F (moving rightward in FIG. 6). At the time of passing) without retaining the retaining thread P, and when retreating, it is reciprocated so as to retain and pass the retaining thread P. A Bella needle is used as the retaining thread insertion needle 62. In the figure, the illustration of the spatula is omitted. The retaining thread insertion needle 62 is connected to an endless belt at the base end thereof, and is configured to reciprocate when the endless belt is driven.
[0004]
[Patent Document 1]
JP-A-8-218249 (paragraphs [0035] to [0039] in FIG. 3, FIG. 3)
[Patent Document 2]
JP 2000-273743 A (paragraphs [0025], [0033], [0052] to [0054], [0061] to [0067], FIGS. 3, 6, 12, and 15 of the specification)
[0005]
[Problems to be solved by the invention]
In the three-dimensional fiber structure thickness direction thread insertion device used to manufacture the three-dimensional fiber structure, the length of the retaining thread insertion needle 62 may vary depending on the width of the laminated yarn group F into which the thickness direction thread z is to be inserted. The thickness of the needle is as thin as about 1 to 2 mm. Accordingly, the retaining thread insertion needle 62 is easily bent and buckled easily. Further, the retaining thread insertion needle 62 is reciprocated so as to pass through a large number of loops L formed by the thickness direction thread z connected to the thickness direction thread insertion needle 61 penetrating the laminated thread group F. When the retaining thread insertion needle 62 is bent or moved while shaking, it interferes with the loop L and the thickness direction thread insertion needle 61. Therefore, a guide member for guiding the retaining thread insertion needle 62 so as to move straight is provided. However, even if there is a guide member, the retaining thread insertion needle 62 may interfere with the loop L, the thickness direction thread insertion needle 61, etc., and the retaining thread insertion needle 62 may be overloaded. However, Patent Document 1 and Patent Document 2 do not describe a case where an overload is applied to the retaining thread insertion needle 62.
[0006]
Further, in a movable body that is easily buckled, such as the retaining thread insertion needle 62, the same reference value (when the compressive force acts on the retaining thread insertion needle 62 as an overload and when the tensile force acts) In the configuration in which the motor is stopped using (threshold), a problem occurs. That is, it is necessary to use a threshold value based on the compression time to prevent buckling, and the threshold value based on the compression time is applied even when a load is applied that does not need to be stopped when a tensile force is applied. The problem of being stopped based on
[0007]
In addition, the moving body is not limited to a buckling mobile body.For example, when the moving body is moved in the vertical direction instead of in the horizontal direction so that the direction of gravity applied to the moving body is different between the forward movement and the backward movement. If the threshold for stopping due to overload is the same during forward movement and backward movement, the above-mentioned problem occurs.
[0008]
The present invention has been made in view of the above-described problems of the prior art, and its purpose is to prevent a moving body driven to reciprocate from being subjected to a load exceeding a preset value (threshold value). In addition, it is an object of the present invention to provide a moving body drive device that can set the threshold value to a different value during forward movement and during backward movement.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, an invention according to claim 1 is a moving body drive device for linearly reciprocating a moving body. The moving body drive device includes a drive unit that moves linearly by the power of a drive source, a power transmission unit provided between the drive unit and the mobile unit, and the drive unit and the power transmission unit separated from each other. 1st connection means to connect movably, and 2nd connection means to connect the said power transmission part and the said mobile body so that isolation | separation is possible. If a first load greater than a preset value is applied to the moving body during the forward movement of the moving body, one of the connected state by the first connecting means and the connected state by the second connecting means is released. It is comprised so that. Further, when a second load greater than a preset value is applied to the moving body when the moving body moves backward, the other of the connected state by the first connecting means and the connected state by the second connecting means is Configured to be releasedPleaseYes.
[0010]
In this invention, the force for linearly moving the moving body is transmitted to the moving body via the power transmission section from the driving section that moves linearly by the power of the drive source. If the load applied to the moving body is greater than or equal to a preset value (threshold value) while the moving body is being moved by the force from the drive unit, one of the first connecting means and the second connecting means is connected. Is released. Therefore, by setting the threshold value to a value less than overload, power transmission can be interrupted before the mobile body is overloaded. In addition, since the load values for releasing the connection of the first connecting means and the second connecting means are different from each other, the value of the overload applied to the moving body is different between when the moving body moves forward and when it moves backward. Even in cases, it can be handled without any problems.
[0011]
  The invention described in claim 2 is a configuration in which, in the invention described in claim 1, the values of the first load and the second load are set to be different.
  Claim3The invention described in claim 1Or claim 2In the invention described in (1), the first connecting means and the second connecting means are configured to be released from the connected state by the action of a force applied to the moving body. In the present invention, when a force corresponding to a load equal to or greater than the threshold is applied to the moving body, one of the first connecting means and the second connecting means is released by the action of the force. Therefore, the configuration of the first connection unit and the second connection unit is simplified as compared with the configuration in which the value of the load is detected and the connection state is released by the driving unit driven based on the signal.
[0012]
  Claim4The invention described in claim3In the invention described in (1), the first connecting means is provided on the first movable engagement portion provided on one of the drive portion and the power transmission portion, and on the other of the drive portion and the power transmission portion. And a first engaged portion that engages with the first movable engaging portion and maintains a connected state. The first movable engagement portion is biased by a biasing means in a direction to engage with the first engaged portion. The second connecting means is provided on the other of the power transmission unit and the movable body, and on the other of the power transmission unit and the movable body. A second engaged portion that engages with the engaging portion and maintains a connected state. The second movable engaging portion is biased by a biasing means in a direction to engage with the second engaged portion. When the moving body moves backward, a force against the urging force of the urging means acts on the first movable engaging portion, and when the moving body moves forward, the urging force of the urging means on the second movable engaging portion. The force which resists acts.
[0013]
In this invention, the first connecting means and the second connecting means are held in a connected state in a state where the movable engaging portion and the engaged portion are engaged with each other, and the movable engaging portion is connected to the engaged portion. When it moves to a position where it does not engage, the connected state is released. The movable engagement portion is urged in a direction to engage with the engaged portion by the urging means. However, when the movable body moves backward, the first movable engagement portion resists the urging force of the urging means. When the force acts and the value of the load acting on the moving body reaches a threshold value, the first movable engagement portion is moved to a position where it does not engage with the first engaged portion. When the moving body moves forward, a force against the urging force of the urging means acts on the second movable engaging portion, and when the load acting on the moving body reaches a threshold value, the second movable engaging portion Is moved to a position where it does not engage with the second engaged portion. Therefore, by setting the urging force of the urging means to a value corresponding to the threshold value, the connected state by the first connecting means and the second connecting means can be released when necessary.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is embodied in a driving device for a retaining thread insertion needle in a thickness direction thread insertion apparatus for a three-dimensional fiber structure will be described with reference to FIGS. FIG. 1A is a schematic side view of a needle driving device for inserting a retaining thread, FIG. 1B is a partially enlarged view of FIG. 1A, and FIG. 1C is a partially enlarged view of FIG. 1D is a partial plan view, FIG. 1E is a partially enlarged view of FIG. 1D, and FIG. 2 is a schematic front view of the thickness direction thread insertion device. Note that FIG. 1A shows a state in which the direction in which the retaining thread insertion needle driving device is viewed is opposite to that in FIG. 2 and is viewed from the back side of the paper surface in FIG. FIGS. 3A and 3B are partial schematic plan views for explaining the action, and FIGS. 4A and 4B are partial schematic side views for explaining the action.
[0015]
The thickness direction thread insertion device is configured in the same manner as the device disclosed in Patent Document 2 previously proposed by the applicant of the present application, except for the retaining thread insertion needle driving device. As shown in FIG. 2, the thickness direction thread insertion device 11 includes a thickness direction thread insertion needle drive unit 13 and a punch needle drive unit (not shown) above the transfer table 12 that supports the laminated yarn group F. Yes. The transfer table 12 is provided with a plurality of traveling wheels 12a on both the left and right sides (left and right sides in FIG. 2), and is provided so as to extend in the longitudinal direction of the machine base frame 14 (perpendicular to the plane of FIG. 2). 15 is movably supported.
[0016]
The machine base frame 14 is provided with a ball screw mechanism 16 which is provided in parallel with the support rail 15 and whose screw shaft is driven to rotate forward and backward by a servo motor (not shown). The air cylinder 18 is fixed to the lower surface of the ball nut 17 of the ball screw mechanism 16, and the screw shaft rotates while the tip of the piston rod of the air cylinder 18 engages with the engagement hole formed in the side wall of the transfer table 12. As a result, the transfer table 12 is moved together with the ball nut 17.
[0017]
A movable support frame 19 is supported on the upper surface of the machine base frame 14 so as to be movable in the longitudinal direction of the machine base frame 14. The movable support frame 19 can reciprocate a distance equal to the mounting pitch between the punch needle (not shown) and the thickness direction thread insertion needle 20 by an air cylinder fixed to the machine base frame 14. In FIG. 2, the punching needle driving unit disposed behind the thickness direction thread insertion needle driving unit 13 is omitted.
[0018]
A pair of left and right rails 21 are arranged on the movable support frame 19 so as to extend in the vertical direction, and a needle support 22 equipped with a thickness direction thread insertion needle 20 in one row is arranged along the rail 21 so as to be movable up and down. It is installed. The needle support 22 is fixed to a ball nut 23 a of a ball screw mechanism 23 disposed between both rails 21, and is lifted and lowered as the screw shaft 23 b of the ball screw mechanism 23 rotates forward and backward. Then, the needle support 22 moves together with the ball nut 23a, and a standby position where the thickness direction thread insertion needle 20 cannot engage with the laminated yarn group F held on the transfer table 12 and a needle hole (not shown) are formed. It moves to the operation position (state shown in FIG. 2) penetrating the laminated yarn group F up to a position opposite to the laminated yarn group F.
[0019]
A support frame 24 is fixed to the lower portion of the machine base frame 14 at a position facing the thickness direction thread insertion needle drive unit 13 and the punch needle drive unit with the movement range of the transfer table 12 in between. In the support frame 24, when the press blocks 25a and 25b insert the thickness direction thread z into the laminated yarn group F, the press blocks 25a and 25b engage with the laminated yarn group F so that the laminated yarn group F is retracted from the thickness direction yarn insertion needle 20 rows. It is movably equipped at a working position that presses to the standby position where it cannot engage with the laminated yarn group F. The press block 25b is arranged behind the press block 25a in FIG.
[0020]
The retaining thread insertion needle driving device 26 is disposed so as to protrude to the side of the machine base frame 14. One end of the support frame 27 of the retaining thread insertion needle driving device 26 is fixed to the support frame 24. The support frame 27 has a pair of pulleys 28a, 28b at the same height position at a portion extending horizontally at a position slightly lower than the transfer table 12, and a direction perpendicular to the arrangement direction of the thickness direction thread insertion needles 20 rows. It is arrange | positioned so that it may extend. An endless belt 29 is wound between the pulleys 28a and 28b so that a part of the travel path is parallel to the arrangement direction of the thickness direction thread insertion needles 20 rows. A pulley 31 is fixed to the end of the rotary shaft 30 on which the pulley 28b disposed on the side close to the machine base frame 14 is fixed so as to be integrally rotatable. In FIG. 2, the pulley 28 b does not appear because it is located on the back side of the page with respect to the pulley 31. A servo motor 32 as a drive source is fixed to the support frame 27 below the pulley 28b, and a belt 34 is wound between the drive pulley 33 fixed to the drive shaft of the servo motor 32 and the pulley 31. . The belt 29 reciprocates as the servomotor 32 is driven to rotate forward and reverse.
[0021]
As shown in FIG. 2, the belt 29 is disposed so that the upper horizontal running position is lower than the height at which the retaining thread is to be inserted and extends in parallel with the arrangement direction of the 20 rows of thickness direction thread insertion needles. ing. As shown in FIG. 1A, a guide path 35 is disposed above the belt 29 so as to extend in parallel with the arrangement direction of the 20 rows of thickness direction thread insertion needles. The guide path 35 is formed to support a retaining thread insertion needle 36 as a moving body so as to be linearly movable along the guide path 35. The retaining thread insertion needle 36 is composed of a rod 36a and a Bella needle 36b fixed to the tip of the rod 36a. The rod 36a is made of carbon fiber reinforced resin. In the figure, the illustration of the spatula is omitted. A rod guide 35a is fixed to the support frame 27 via a bracket (not shown) so that one end of the guide path 35 is positioned in the vicinity of the end of the row of thickness direction thread insertion needles 20 in the state of being arranged at the operating position. ing. The rod guide 35a restricts rolling of the retaining thread insertion needle 36.
[0022]
A guide rail 37 is fixed to the support frame 27 horizontally at an intermediate position between the upper and lower horizontal running positions of the belt 29. On the guide rail 37, a bracket 38 as a drive unit that moves linearly by the power of the drive source and a power transmission unit 39 that transmits the force of the drive unit to the moving body are respectively connected via the linear guide block 40. It is supported so as to be movable along the guide rail 37.
[0023]
The bracket 38 is formed in a U-shaped cross section, and is connected to the upper running portion of the belt 29 at the upper piece 38a as shown in FIGS. 1 (b) and 1 (c). A damper 41 constituting a first connecting means for connecting the bracket 38 and the power transmission unit 39 is fixed to the upper piece 38a so as to extend in the vertical direction. The damper 41 includes a cylinder 42 and a plunger 42a that can be projected and retracted with respect to the cylinder 42 and is urged toward the protruding side by an urging means (for example, a spring) (not shown) built in the cylinder 42. The plunger 42a constitutes a first movable engaging portion, and an engaging portion 42b having a slope is formed at the tip thereof. When a pressing force is applied to the engaging portion 42b from the right direction in FIGS. 1B and 1C perpendicular to the axial direction of the plunger 42a, the plunger 42a is immersed in the cylinder with respect to the plunger 42a. It is formed in a shape in which a component force in the direction to be applied acts. If the second load greater than a preset value is applied to the retaining thread insertion needle 36 when the retaining thread insertion needle 36 moves backward, the spring incorporated in the cylinder 42 is engaged. The plunger 42a is formed to have a spring force that allows the plunger 42a to move to a position where the engagement with a first engaged portion described later is released. That is, the first connecting means is configured to be released from the connected state by the action of a force applied to the moving body.
[0024]
The power transmission unit 39 includes a block 43 fixed to the linear guide block 40 and a support plate 44 fixed to the upper portion of the block 43. A cylindrical member 45 having a small-diameter screw shaft 45a at one end is fixed horizontally to the block 43 in a state where the screw shaft 45a is screwed into a screw hole formed on an end surface of the block 43 facing the bracket 38. Has been. A first engaged portion 45b that can engage with the engaging portion 42b is formed near the tip of the cylindrical member 45. The first engaged portion 45 b is configured by an annular groove extending along the circumferential direction of the cylindrical member 45. The first engaged portion 45b is formed such that the cross-sectional shape of the annular groove has an inclined surface having the same angle as that of the engaging portion 42b. Then, with the engaging portion 42b engaged with the first engaged portion 45b, the bracket 38 and the power transmission portion 39 are connected and moved on the guide rail 37 integrally. The cylindrical member 45 constitutes a first connecting means together with the damper 41.
[0025]
As shown in FIGS. 1B and 1D, a second connection for releasably connecting the power transmission unit 39 and the retaining thread insertion needle 36 to the upper portion of the support plate 44 of the power transmission unit 39. A damper 46 constituting the means is fixed so as to extend in a horizontal state in a direction orthogonal to the rod 36a, that is, the retaining thread insertion needle 36. As shown in FIG. 1D, the damper 46 is urged toward the protruding side by a cylinder 47 and an urging means (for example, a spring) (not shown) built in the cylinder 47 and can be moved in and out of the cylinder 47. A plunger 47a is provided. The plunger 47a constitutes a second movable engagement portion, and an engagement portion 47b is formed at the tip thereof.
[0026]
As shown in FIGS. 1D and 1E, the shape of the engaging portion 47b corresponds to the second engaged portion 48 formed near the proximal end of the rod 36a of the retaining thread insertion needle 36. It is shaped to the shape. The second engaged portion 48 is a surface 48a orthogonal to the moving direction of the rod 36a when viewed from above (plan view), and an acute angle with the surface 48a provided on the distal end side of the rod 36a with respect to the surface 48a. Are formed in a shape having an inclined surface 48b. Therefore, when a pressing force is applied to the engaging portion 47b in a direction orthogonal to the axial direction of the plunger 47a and from the inclined surface 48b side, a component force in a direction in which the plunger 47a is immersed in the cylinder 47 acts on the plunger 47a. To do. However, when a pressing force is applied from the surface 48a side, a component force in a direction in which the plunger 47a is immersed in the cylinder 47 is not applied. If the first load greater than a preset value is applied to the retaining thread insertion needle 36 when the retaining thread insertion needle 36 moves forward, the spring incorporated in the cylinder 47 is engaged with the engaging portion 47b. The plunger 47a is formed to have a spring force that allows the plunger 47a to move to a position where the engagement with a second engaged portion described later is released. That is, the second connecting means is also configured to be released from the connected state by the action of a force applied to the moving body.
[0027]
The spring for biasing the plunger 42a constituting the first connecting means to the protruding side is different from the spring of the plunger 47a constituting the second connecting means, and the biasing force of the spring for the plunger 42a is different from the plunger 47a. It is set larger than the urging force of the spring.
[0028]
Next, the operation of the retaining thread insertion needle drive device 26 configured as described above will be described. While the laminated yarn group F is supported by the transfer table 12 and the retaining yarn insertion needle 36 is disposed at the standby position, the thickness direction yarn insertion needle driving unit 13 is driven, and as shown in FIG. The thickness direction thread insertion needle 20 is pierced into F. When the thickness direction thread insertion needle 20 is slightly pulled back, a loop L of the thickness direction thread z is formed on the protruding side of the thickness direction thread insertion needle 20 as in the case shown in FIG.
[0029]
Next, the servo motor 32 is driven to rotate forward, and the retaining thread insertion needle 36 moves forward (forward) to a position where the Bella needle 36b passes through the loop L and holds a retaining thread (not shown). Then, after the retaining thread is held at the tip of the spatula needle 36b, the servo motor 32 is driven in reverse to move the retaining thread insertion needle 36 backward (return) to the standby position, and the retaining thread becomes thick. It is inserted into the loop L of the directional yarn z in a folded shape. Thereafter, the thickness direction thread z is pulled back together with the thickness direction thread insertion needle 20, and the laminated yarn group F is tightened by the thickness direction thread z via the retaining thread.
[0030]
The forward movement of the retaining thread insertion needle 36 will be described in detail. By the forward rotation of the servo motor 32, the pulleys 28a and 28b are rotated counterclockwise in FIG. The stop thread insertion needle 36 is moved in the forward direction (left direction in FIG. 1A). As the belt 29 moves, the bracket 38 is moved integrally with the upper traveling portion of the belt 29, and the force for moving the bracket 38 is applied to the power transmission portion 39 via the damper 41 and the first engaged portion 45b. Travel force). The force transmitted to the power transmission unit 39 is transmitted to the retaining thread insertion needle 36 via the damper 46 and the second engaged portion 48. Accordingly, with the forward rotation of the servo motor 32, the retaining thread insertion needle 36 is moved in the forward direction.
[0031]
If a load is applied to the retaining thread insertion needle 36 during the forward movement of the retaining thread insertion needle 36, that is, if a force that suppresses the forward movement is applied to the retaining thread insertion needle 36, the retaining thread insertion needle 36. A force is applied from the inclined surface 48b of the second engaged portion 48 to the engaging portion 47b of the plunger 47a in the direction indicated by the dashed arrow in FIG. The force includes a component force in a direction in which the plunger 47a is moved to the immersive side against the force of the urging means. When a first load greater than a preset value is applied to the retaining thread insertion needle 36, the plunger 47a is in a position where the engagement between the engaging portion 47b and the second engaged portion 48 is released. Until the cylinder 47 is immersed. As a result, the engaged state between the engaging portion 47b that connects the power transmission portion 39 and the retaining thread insertion needle 36 and the second engaged portion 48, that is, the connected state by the second connecting means is released. Thus, the state shown in FIG.
[0032]
When a load is applied to the retaining thread insertion needle 36, a force is applied from the first engaged portion 45b to the engaging portion 42b of the plunger 42a via the power transmission portion 39. However, the force does not include the component force in the direction in which the plunger 42a is moved to the immersive side against the force of the urging means. Therefore, during the forward movement of the retaining thread insertion needle 36, the engaged state between the first engaged portion 45b and the engaging portion 42b, that is, the connected state by the first connecting means is not released.
[0033]
On the other hand, if a load is applied to the retaining thread insertion needle 36 during the backward movement of the retaining thread insertion needle 36, that is, if a force for suppressing the backward movement is applied to the retaining thread insertion needle 36, the power transmission unit 39 is applied. A force is applied in the direction indicated by the dashed arrow in FIG. A force in the same direction is applied from the surface 48a of the second engaged portion 48 of the retaining thread insertion needle 36 to the engaging portion 47b of the plunger 47a. However, the force does not include the component force in the direction in which the plunger 47a is moved to the immersive side against the force of the urging means. Therefore, when the retaining thread insertion needle 36 is moved backward, the engagement state between the engaging portion 47b connecting the power transmission portion 39 and the retaining thread insertion needle 36 and the second engaged portion 48, that is, The connected state by the second connecting means is not released.
[0034]
When a load is applied to the retaining thread insertion needle 36, a force is applied from the first engaged portion 45b to the engaging portion 42b of the plunger 42a via the power transmission portion 39, and the plunger 42a is applied to the force. It has a component force in a direction to move to the immersive side against the force of the biasing means. When a second load equal to or greater than a preset value is applied to the retaining thread insertion needle 36, the plunger 42a is in a position where the engagement between the engaging portion 42b and the first engaged portion 45b is released. Until the cylinder 42 is immersed. As a result, the engaged state between the engaging portion 42b for connecting the power transmission portion 39 and the bracket 38 and the first engaged portion 45b, that is, the connected state by the first connecting means is released, and FIG. ). Since the second load value is set to be larger than the first load value, when the retaining thread insertion needle 36 is moved backward, a larger load is applied to the retaining thread insertion needle 36 than during forward movement. Power transmission is cut off.
[0035]
This embodiment has the following effects.
(1) In the retaining thread insertion needle drive device 26, the force of the drive section (bracket 38) that moves linearly by the power of the drive source (servo motor 32) is transmitted to the power transmission section 39 via the first connecting means. The force of the power transmission unit 39 is transmitted to the moving body (the retaining thread insertion needle 36) via the second connecting means. When a first load greater than a preset value is applied during the forward movement of the retaining thread insertion needle 36, the connection state by the second coupling means is released, and when the retaining thread insertion needle 36 is moved backward, When a second load equal to or greater than the set value is applied, the connected state by the first connecting means is released. The value of the first load is set larger than the value of the second load.
[0036]
Therefore, even when the retaining thread insertion needle 36 is loaded during the forward movement of the retaining thread insertion needle 36, the power transmission from the drive unit is interrupted before the overload is applied, and the retaining thread insertion needle 36 is inserted. Damage to the common needle 36, the thickness direction thread insertion needle 20, or the thickness direction thread can be reliably avoided. Further, when the pulling force is applied to the retaining thread insertion needle 36, the power transmission is not interrupted until a larger load is applied to the retaining thread insertion needle 36 than when the retaining thread insertion needle 36 is moved forward. The problem that the retaining thread insertion needle 36 is stopped in a state where a load is applied can be prevented. That is, since the load values for releasing the connection between the first connecting means and the second connecting means are different from each other, the value of the overload applied to the moving body is different between when the moving body moves forward and when it moves backward. Even in cases, it can be handled without any problems.
[0037]
(2) The first connecting means and the second connecting means are configured so that the connected state is released by the action of a force applied to the moving body (the retaining thread insertion needle 36). Therefore, when a force corresponding to a load equal to or greater than a preset value is applied to the retaining thread insertion needle 36, one of the connection states of the first connection means and the second connection means is released by the action of the force. The Therefore, the configuration of the first connection unit and the second connection unit is simplified as compared with the configuration in which the value of the load is detected and the connection state is released by the driving unit driven based on the signal.
[0038]
(3) The first connecting means is connected to the first movable engagement portion (plunger 42a) provided in the drive portion and the first movable engagement portion provided in the power transmission portion 39. A first engaged portion 45b that holds the first engaged portion, and the first movable engaging portion is biased by a biasing means in a direction to engage with the first engaged portion 45b. The second connecting means includes a second movable engagement portion (plunger 47a) provided in the power transmission portion and a second movable engagement portion provided in the moving body and engaged with the second movable engagement portion to maintain a connected state. The second movable engaging portion is urged by the urging means in a direction to engage with the second engaged portion 48. When the moving body moves backward, a force against the urging force of the urging means acts on the first movable engaging portion, and when the moving body moves forward, the urging force of the urging means on the second movable engaging portion. The force which resists acts. Therefore, by setting the urging force of the urging means to a value corresponding to a preset load value, the connection by the first connection means and the second connection means using the force acting on the moving body. The state can be released when necessary.
[0039]
(4) The first connecting means and the second connecting means resist the urging force of the urging means against the plungers 42a, 47a via the engaging portions 42b, 47b formed at the tips of the plungers 42a, 47a. It is a structure which moves to the immersive side and cancels the connected state. Therefore, even if the urging force of the urging means is the same by changing the angle with respect to the axial direction of the surfaces of the engaging portions 42b, 47b that engage with the first and second engaged portions 45b, 48, the plunger It is possible to adjust the setting of the force for immersing 42a and 47a, and it becomes easy to set to a desired value in combination with the urging force.
[0040]
(5) Since it is applied to a driving device that moves the retaining thread insertion needle 36 that is thin and long and is likely to buckle as a moving body, the retaining thread insertion needle 36 can be smoothly inserted. Done.
[0041]
The embodiment is not limited to the above, and may be embodied as follows, for example.
The first movable engaging portion constituting the first connecting means may be provided on the power transmission portion 39 side, and the first engaged portion may be provided on the drive portion (bracket 38) side. For example, a U-shaped bracket is provided instead of the block 43, and the damper 41 is fixed to the bracket so as to extend in the vertical direction. On the other hand, the cylindrical member 45 is fixed to the bracket 38 side at a position where the first engaged portion 45b can be engaged with the engaging portion 42b of the plunger 42a of the damper 41. In this case, the same effect as that of the above embodiment can be obtained.
[0042]
The second movable engaging portion constituting the second connecting means may be provided on the moving body (retaining thread insertion needle 36) side, and the second engaged portion may be provided on the power transmission portion 39 side. . For example, the cylinder 47 is fixed to the base end side of the rod 36 a so as to be orthogonal to the rod 36 a, and the second engaged portion 48 is formed on the support plate 44. The direction of the inclined surface 48b is such that if the moving body (the retaining thread insertion needle 36) moves forward and a first load greater than a preset value is applied to the moving body, the plunger 47a is moved from the inclined surface 48b in the immersion direction. Set so that the force in the direction to be applied acts. Also in this case, during the forward movement of the mobile body, the power transmission from the drive unit is interrupted before the mobile body is overloaded, and the mobile body is prevented from being overloaded.
[0043]
○ The first connecting means and the second connecting means are not limited to the configuration in which the connected state is released by the action of the force applied to the moving body, but the value of the load applied to the moving body is detected by a sensor, and the detection signal is On the basis of this, when the load reaches a preset value, the drive unit may be operated to release the connected state. For example, in place of the dampers 41 and 46, a solenoid is used as a driving means, and an engaging portion is formed at the tip of the plunger as in the above embodiment. When the value of the load applied to the moving body is less than the set value, the plunger is held at the protruding position to secure the connected state, and when the load value exceeds the set value, the plunger is immersed and the connected state is released. The configuration is as follows. In this case, it becomes easy to change the load value serving as a reference for releasing the connection of the first connecting means and the second connecting means. For example, the thickness direction thread insertion needle 20, the retaining thread insertion needle 36, and the thickness direction thread z have different thicknesses by changing the type of three-dimensional fiber structure produced by the same thickness direction thread insertion apparatus 11. Is used, it is preferable to change the set value of the load because the allowable value of the load applied to the retaining thread insertion needle 36 is different. At that time, it is possible to easily cope with this by simply changing the load value serving as a reference for outputting a drive signal for immersing the plunger into the solenoid.
[0044]
○ Since the component force in the direction in which the plunger is moved to the immersive side is changed between the forward side and the backward side, the angle at which the plunger is chamfered may be changed between the forward side and the backward side. For example, as shown in FIG. 5, the rod 36a of the retaining thread insertion needle 36 is provided with a slope 49a as a first engaged portion and a slope 49b as a second engaged portion. Is provided. Further, instead of the damper 46 moved integrally with the belt 34, a damper 50 is used in which a slope 51a having the same angle as the slope 49a and a slope 51b having the same angle as the slope 49b are formed at the tip of the plunger 50a. The slope 51a and the plunger 50a constitute a first movable engagement portion and correspond to the first connecting means. The slope 51b and the plunger 50a constitute a second movable engagement portion and correspond to a second connecting means. In this way, only one damper is required.
[0045]
A frustoconical engaging portion 42b having a reduced diameter at the tip may be formed as the engaging portion 42b at the tip of the plunger 42a of the damper 41. Then, the cross-sectional shape of the annular groove as the first engaged portion 45b formed near the tip of the columnar member 45 fixed to the block 43 is matched with the shape of the first engaged portion 45b. That is, the shape of both side walls in the cross section of the annular groove is formed in a tapered shape having the same angle as the taper of the engaging portion 42b. In this case, when the plunger 42a is engaged with the first engaged portion 45b again at the time of assembly or when the engaging portion 42b that has been disengaged from the first engaged portion 45b is engaged again. Even if it rotates, it can be easily arranged at the engaging position without any trouble.
[0046]
In the above embodiment, an air cylinder may be provided instead of the solenoid, and the engaging portion may be formed at the tip of the piston rod.
As a means for linearly moving the bracket 38 as a drive unit, a linear actuator may be used instead of the belt 29 driven by the servo motor 32 via the drive pulley 33 and the pulleys 31, 28b, 28a. . For example, the bracket 38 may be fixed to a ball nut of a linear actuator provided with a ball screw mechanism.
[0047]
(Circle) You may integrally form the block 43 and the support plate 44 which comprise the power transmission part 39. FIG.
○ Damper 41, 46, 50Are plungers 42a, 47a50aIt is good also as a structure using gas pressure instead of a spring as urging means for urging the projection side.
[0048]
○ The moving body is not limited to the retaining thread insertion needle 36 used in the thickness direction thread insertion device 11, and is reciprocated linearly and a load acting on the moving body during forward movement and backward movement However, it is sufficient if the values that cause overload are different. For example, the thickness direction thread insertion device 11 may be applied to the thickness direction thread insertion needle drive unit 13 and the punch needle drive unit. Since the thickness direction thread insertion needle drive unit 13 moves the thickness direction thread insertion needle 20 fixed to the needle support 22 up and down, the thickness direction thread insertion needle drive unit 13 drives the thickness direction thread insertion needle even in the normal state during the upward movement and the downward movement. The load applied to the portion 13 is different, and in addition, the degree of load is different when the thickness direction thread insertion needle 20 is inserted into the laminated yarn group F and when it is pulled out. Accordingly, it is possible to prevent a load exceeding a preset value (threshold value) from being applied to the moving body during forward movement and during backward movement, and to set different threshold values for forward movement and backward movement. It is useful to set.
[0049]
The connection state is not released by the second connection means when the first load exceeding the preset value is applied to the mobile body during the forward movement of the mobile body, not the first connection. The connection state by the second connection means may be released when the connection state by the means is released and a second load is applied during the backward movement.
[0050]
The configuration may be such that the reference value of the load acting on the moving body when moving forward is set larger than the reference value of the load acting on the moving body when returning.
The following technical idea (invention) can be understood from the embodiment.
[0051]
(1) In the invention described in claim 1, the first connecting means and the second connecting means are driven based on a detection signal of a detecting means for detecting a magnitude of a load applied to the moving body. The movable engaging portion is driven by the means so as to be switched between a connected state and a non-connected state.
[0052]
  (2) Claim4The first and second movable engaging portions are damper plungers, and the biasing means is a spring built in a damper cylinder.
[0053]
  (3) Claims 1 to claims4In the invention according to any one of the technical ideas (1) and (2), the moving body is a retaining thread insertion needle of a three-dimensional fiber structure thickness direction thread insertion apparatus.
[0054]
【The invention's effect】
  As detailed above, claims 1 to claim4According to the invention described in (2), it is possible to prevent the moving body driven to reciprocate from being applied with a load greater than a preset value (threshold value), and the threshold value during forward movement and during backward movement. Can be set to different values.
[Brief description of the drawings]
FIG. 1A is a schematic side view of a needle driving device for retaining thread insertion according to an embodiment, FIG. 1B is a partially enlarged view of FIG. 1A, and FIG. 1C is a partially enlarged view of FIG. (D) is the fragmentary top view of (a), (e) is the elements on larger scale of (d).
FIG. 2 is a schematic partial front view of a thickness direction thread insertion device.
FIGS. 3A and 3B are schematic partial plan views for explaining the operation when a load greater than a set value is received during forward movement.
FIGS. 4A and 4B are schematic partial side views for explaining the action when a load greater than a set value is received during reverse movement.
FIG. 5 is a schematic plan view showing first and second connecting means according to another embodiment.
FIG. 6 is a schematic side view for explaining the insertion state of the retaining thread.
[Explanation of symbols]
32 ... Servo motor as drive source, 36 ... Retaining thread insertion needle as moving body, 38 ... Bracket as drive unit, 39 ... Power transmission unit, 42a ... First movable member constituting first connecting means Plunger as an engaging portion, 45b ... first engaged portion constituting the first connecting means, 47a ... plunger as the second movable engaging portion constituting the second connecting means, 48 ... second 49a... Sloped as the first engaged part, 49b... Sloped as the second engaged part, 50a... The first movable engaging part and the first connecting means. Plunger 51a ... slope, 51b ... slope 51b constituting the second movable engagement portion and the second connecting means.

Claims

A moving body drive device for linearly reciprocating a moving body,
A drive unit that moves linearly by the power of the drive source;
A power transmission unit provided between the driving unit and the moving body;
First connection means for releasably connecting the drive unit and the power transmission unit;
A second connecting means for detachably connecting the power transmission unit and the moving body;
If a first load greater than a preset value is applied to the moving body during the forward movement of the moving body, one of the connected state by the first connecting means and the connected state by the second connecting means is released. When a second load greater than a preset value is applied to the moving body when the moving body moves backward, the other of the connected state by the first connecting means and the connected state by the second connecting means is released. A moving body drive device configured to be configured.

The moving body drive apparatus according to claim 1, wherein the first load and the second load are configured to have different values .

3. The moving body drive device according to claim 1, wherein the first connecting means and the second connecting means are configured to be disconnected from each other by the action of a force applied to the moving body.

The first connecting means is provided on the other of the drive unit and the power transmission unit, the first movable engagement unit provided on one of the drive unit and the power transmission unit, and the first connection unit. A first engaged portion that engages with the movable engaging portion and maintains a connected state, and the first movable engaging portion is attached in a direction to engage with the first engaged portion. The second connecting means includes a second movable engagement portion mounted on one of the power transmission unit and the movable body, and the other of the power transmission unit and the movable body. And a second engaged portion that engages with the second movable engaging portion and maintains a connected state, and the second movable engaging portion is the second engaged portion. The urging means is urged in the direction in which the urging means is engaged, and a force against the urging force of the urging means acts on the first movable engaging portion when the moving body moves backward. During forward movement of the moving body movable body driving device according to claim 3, force against the biasing force of the biasing means to the second movable engaging portion acts.